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The Study on the New Compensation Strategy of the Dynamic Voltage Restorer

Author: SunZhe
Tutor: XiaoXiangNing
School: North China Electric Power University (Beijing)
Course: Power Electronics and Power Drives
Keywords: Dynamic Voltage Restorer Compensation strategies Phasor diagram method Three single-phase H-bridge Shared DC bus
CLC: TM761.1
Type: Master's thesis
Year: 2010
Downloads: 270
Quote: 1
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Abstract


Dynamic voltage restorer (DVR) can effectively relieve the influence of voltage sag. DVR compensation strategy of the traditional analysis method has some shortage, cause analysis unbalance voltage sag or load balance of complicated situation more difficult. This paper presents a based on the load voltage phasor diagram analysis method, this method is clear physical conception, easy to determine the DVR compensation range, on the analysis of complicated voltage sag with great advantages, and can be applied to unbalanced load cases. In this paper, the analysis method of the basic ideas and realization method, and this method, in view of the three single phase H bridge DVR characteristics, the compensation strategy is analyzed, and puts forward an improved minimum energy compensation method and can be extended to the greatest extent DVR compensation time. Due to the three single-phase H bridge DVR each phase can't realize zero active compensation, not the infinite to compensate voltage sag, and common dc mother linear DVR can overcome the shortcomings of this. So in this paper a new analysis method, the common dc mother linear DVR compensation strategy, realize the zero active compensation. The simulation results show the above theory correct.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation > Automatically adjusts > Automatic adjustment of voltage and reactive power
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